Select the correct answerWhich of the following are some common RDBMS in use?OptionsMySQLOracleHeidiSQLAll of these

To determine the correct answer, let's analyze the options provided and the context of RDBMS (Relational Database Management Systems).

Analysis of Options

1. MySQL: A widely used open-source RDBMS known for its reliability and ease of use. It's commonly used in web applications.

2. Oracle: A powerful and popular commercial RDBMS that offers advanced features and scalability, often used by large enterprises.

3. HeidiSQL: This is not a standalone RDBMS; instead, it is a front-end tool used primarily for managing MySQL databases, although it can also support others like PostgreSQL or Microsoft SQL Server.

4. All of these: This option suggests that the previous three options are all common RDBMS.

Conclusion

Since MySQL and Oracle are both recognized as popular RDBMS, but HeidiSQL is merely a tool for managing databases, the best answer among the choices given would be:

Final Answer

MySQL and Oracle are common RDBMS in use. Therefore, the correct option is MySQL and Oracle, not All of these.